The JBO Thread Plug Gauge is a precision Go/No-Go gauge engineered for metric fine threads, specifically M30 x 3 with a 6H tolerance. Its compact, knurled body and hardened steel construction deliver fast, repeatable hole-thread checks for engineers, production teams, and quality inspectors who need reliable mating fits before assembly.

• Go/No-Go Quick-Checks: Perform fast, decisive pass/fail checks on metric fine threads (M30 x 3) against 6H tolerance, helping you confirm fit quickly and reduce rework.
• Hardened Steel Durability: Built to last in busy workshops, resisting wear and maintaining accurate measurements through thousands of inspections.
• Right-Hand M30 x 3, 6H Calibration: Precisely tuned for right-hand threads with 6H tolerance, delivering consistent, repeatable results across production runs.

Using the JBO Thread Plug Gauge helps you validate threaded holes before assembly, reducing downtime from mismatches and speeding up quality checks. Its robust construction and straightforward operation support reliable, consistent results, improving workflow and overall performance in manufacturing, machining, and repair environments.